Arthropods of Mediterranean-Type Ecosystems by George P. Stamou

By George P. Stamou

G.P. Stamou describes the adaptive options that permit arthropods to deal with the severity of Mediterranean environments. After an advent to the constitution and serve as of Mediterranean-type ecosystems, ecophysiological diversifications to water rigidity and ranging temperature are thought of. additional, task styles and existence cycle strategies are mentioned when it comes to the peculiarity of Mediterranean environments. Phenological styles and inhabitants dynamics in addition to group constructions also are provided. the amount ends with a synthesis of lifestyles historical past tactics.

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In general, different phenomena affecting animal survival, such as cuticular transpiration, are insignificant below certain critical temperatures (Cloudsley-Thompson 1975). The survival and feeding activity of arthropods commonly takes place above a humidity threshold between 65 and 85% relative humidity. It seems that, like their temperate relatives, the short-term response of the Mediterranean animals to air humidity is of the all-or-none type. The dependence of activity on temperature appears to be more complicated.

Respiration rate (RR) plotted against live weight (W double log scale) of the collembolan Onychiurus meridiatus at six different temperatures. 2 D.. • Animals were collected for respirometry measurements from the evergreensclerophyllous formation at Hortiatis. The animals studied were the long-lived millipede Glomeris balcanica (approximately 11 years life expectancy, the univoltine collembolan Onychiurus meridiatus (which aestivates in summer and displays density peak in autumn), and the annual oribatid mites Scheloribates cf.

9a-c. latipes. b Pilogalumna allifera and c Achipteria oudemansi to constant temperature conditions. Arrows indicate the moment of temperature change. (Stamou et al. 1995) 3 days at 24 and 11 °c. After 72 h the temperature of 24 °C experienced by the experimental animals was changed to 11 °C, while that of 11 °C experienced Acclimation to Constant Temperature 39 by the second batch of experimental animals was raised to 24 DC. Thus, animals acclimated for 3 days to constant temperature experienced a sudden temperature rise or reduction of 13 DC.

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